Some may think the rear is too busy, but this is the pure Classic Space style. I like the detail of your work here.... go the Classic Space

Very cool. Nice colors and shape. Love the classic Space influence. My only criticism is that it gets a little cluttered, and overly busy at the top and back.

I love the shaping of the forward hull, but the gun tower kind of breaks up the sleek look. If you removed the sensor tower behind it you could place the turret flush with the hull (move the two lower SW cannons up so the four guns are roughly on the same level), maintaining the fast and deadly look of the rest of the design.

Better than your 453, because it's more compact, better engine placement, and sleeker body...well done!